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West Nile virus (WNV) is a single-stranded RNA virus that causes West Nile fever. It is a member of the family Flaviviridae , from the genus Flavivirus , which also contains the Zika virus , dengue virus , and yellow fever virus.
West Nile fever is an infection by the West Nile virus, which is typically spread by mosquitoes. [1] In about 80% of infections people have few or no symptoms . [ 2 ] About 20% of people develop a fever , headache, vomiting, or a rash. [ 1 ]
West Nile virus (WNV) is a mosquito-borne virus first identified in the United States in 1999. It is most commonly found in Africa, Europe, the Middle East and North America.
Although West Nile Virus was the most common cause of neuroinvasive arboviral disease in the United States in 2021, as in previous years, another disease – caused by the La Crosse virus ...
"West Nile virus is the leading cause of mosquito-borne disease in the continental United States and cases are seen every year," Dr. Erin Staples, a medical epidemiologist with the CDC’s ...
U.S. West Nile virus (WNV) neuroinvasive disease incidence as of Sep 4, 2012. The West Nile virus quickly spread across the United States after the first reported cases in Queens, New York, in 1999. The virus is believed to have entered in an infected bird or mosquito, although there is no clear evidence.
What is West Nile virus? West Nile circulates mostly among birds that serve as vectors for mosquitoes, according to the CDC. West Nile was first identified in Uganda’s West Nile region before it ...
West Nile virus was detected in the United States for the first time in 1999, and the number of Marylanders infected with the virus fluctuates each season. In 2023, seven Maryland residents were ...